Flagging at Night

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Date Posted: 09/12/2016

Night work flaggers are faced with more challenging and dangerous situations than flaggers working during daylight hours.  Nighttime drivers are more inattentive due to driver fatigue from the completion of the day. It is important for flaggers to remain alert and watch traffic approaching from both directions.

Nighttime Apparel

  • Garment should be able to be seen from 1000 feet. If not, replace apparel.

  • Hours of darkness are ½ hour after sunrise and ½ hour before sunset.

  • Class 2 or 3 apparel, which meets the ANSI/ISEA 107-1999 standard, and high visibility trousers with retro-reflexive banding which meets the ANSI/ISEA 107-1999 standard.

  • High visibility hardhat with 12 square inches of retro-reflexive banding - 3 inches each side.

Flagger Station

  • The flagger station shall be illuminated but not cause any glare on the road.

  • Consider additional devices or increased sign distances and additional lighting.

  • Locate the station away from other construction activity.

Other Considerations

  • High visibility retro-reflective gloves

  • Flashlight with 8 inch wand

  • 24 inch stop/slow paddle

  • Warmer clothing

  • Warning lights

SPECIAL NOTE: Never assume that a driver sees you.  Do not take your eyes off of the vehicle until it has come to a complete stop.


Presenter tips

  • Pre-read the Toolbox Talk. Your comfort level and confidence will be higher if you know your topic.

  • Discuss related tasks, work areas or events that make the Toolbox Talk relevant to your job site.

  • Involve the workers by asking questions and input that drives discussion.

Questions for Discussion

  • What other reasons are drivers more inattentive at night?

  • What weather conditions make flagging at night more dangerous?

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